R＆D of lead-glass ring-imaging Cherenkov detector

铅玻璃环形成像切伦科夫探测器的研发

• 批准号: 11440086
• 负责人: KOBAYASHI Takashi
• 金额: $ 6.59万
• 依托单位: High Energy Accelerator research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11440086/
• 关键词: Neutrino; Mass spectrometer; Neutrino oscillation; Electron; Lmaging; Image intensifier; CCD; イメージインテシファイア; 電磁カロリメータ; イメージング検出器; チェレンコフ光; シンチレーション光; ニュートリノ質量; 鉛ガラス; リングイメージ; ハイブリッドPMT

First, we tried to detect electron neutrino interaction by using lead-glass detector in the current on-going neutrino oscillation experiment K2K. In the K2K experiment, the ve component is only 1% of the main component of vμ. In this study we established to detect small amont of ve interaction in large background. Also we demonstrated the limitation of convension electromagnetic Calometer in a separated function detector for the ve detection purpose.For the future high-sensitivity imaging ne detector, there might be two possible options ; Cherenkov imaging detector and scintillation imaging detector. The difference between these two is the light source, Cherenkov light or scintillation right. The former one collect the light by spherical mirror and the resulting image of a particle is a ring on the screen. The latter on collect the light by optical lense and a image of particle track is on the screen. These two types of detectors are very similar and many parts/techniques are common. And both have a good potential to be a ve detector. So, we have made R＆D work, keeping the development or boty types of detectors in mind.In the first year of this Graint-in-Aid, conceptual design of the detector was done using Monte-Carlo simulation. Performance of both types of detectors are compared. In the second year, NaI scintillator block, optical lense and Image Intensifier tube were purchased ahd prototype detector was constructed. And basid performance were investigated. In the last year, in cooperation with Kyoto University, we made cosmic-ray measurement and beam test. In the cosmic-ray measurement, clear track images of stopping muons with associated decay electrons were recorded. Currently, analysis of the cosmic-ray and beam iea is underway to evaluate the performance of the detector quiantitatively.

首先，我们在目前正在进行的中微子振荡实验K2K中尝试使用铅玻璃探测器来探测电子中微子相互作用。在K2K实验中，ve成分仅为vμ主要成分的1%。在这项研究中，我们建立了在大背景下检测少量 ve 相互作用的方法。我们还证明了传统电磁热量计在用于ve检测目的的分离功能探测器中的局限性。对于未来的高灵敏度成像ne探测器，可能有两种可能的选择；切伦科夫成像探测器和闪烁成像探测器。这两者之间的区别在于光源，切伦科夫光或闪烁对。前者通过球面镜收集光线，所得粒子图像在屏幕上形成一个环。后者通过光学透镜收集光线，并在屏幕上显示粒子轨迹的图像。这两种类型的探测器非常相似，并且许多部件/技术是通用的。两者都具有成为 ve 探测器的良好潜力。因此，我们在进行研发工作时，始终牢记探测器的开发或本体类型。在本次援助的第一年，探测器的概念设计是使用蒙特卡罗模拟完成的。比较了两种类型探测器的性能。第二年，购买了NaI闪烁体块、光学透镜和像增强管，并建造了原型探测器。并对基本性能进行了考察。去年我们与京都大学合作进行了宇宙射线测量和束流测试。在宇宙射线测量中，记录了停止μ子及其相关衰变电子的清晰轨迹图像。目前，正在对宇宙射线和束流IEA进行分析，以定量评估探测器的性能。

项目成果

K2K Collaboration: ""Detection of Accelerator-Produced Neutrinos at a Distance of 250km""Physics Letters. B511. 178-184 (2001)

K2K 合作：“在 250 公里距离处检测加速器产生的中微子”《物理快报》。

T.Kobayashi: ""Present and future of the Japanese long baseline neutrino oscillation experiment""Proceedings of the 2nd International Workshop on Neutrino Oscillation and Their Origin. 152-161 (2001)

T.Kobayashi：“日本长基线中微子振荡实验的现在和未来”第二届中微子振荡及其起源国际研讨会论文集。

T.Kobayashi: "Present and future of the Japanese long baseline neutrino oscillation experiment"Proceedings of the 2nd International Workshop on Neutrino Oscillation and Their Origin. 152-161 (2001)

T.Kobayashi：“日本长基线中微子振荡实验的现在和未来”第二届中微子振荡及其起源国际研讨会论文集。

K2K collaboration: "Detection of Accelerator-Produced Neutrinos at a Distance of 250km"Phys. Lett. B511. 178-184 (2001)

K2K 合作：“在 250 公里距离处检测加速器产生的中微子”Phys。

小林隆,長谷川琢也 他: "TAUNEUTRINOS FAVORED OVER STERILE NEUTRINOS IN ATMOSPHERIC MUON NEUTRINO OSCILLATIONS"Physical Review Letters. 85. 3999-4003 (2000)

Takashi Kobayashi、Takuy​​a Hasekawa 等人：“在大气 MUON 中微子振荡中，TAUNEUTRINOS 优于 STERILE NEUTRINOS”《物理评论快报》85. 3999-4003 (2000)。